Hand held finger controlled switch device with flexible wrist strap mount

ABSTRACT

A control device for apparatus is adapted for support on the fourth finger of an operator&#39;&#39;s hand, has a housing of contoured shape to fit in the palm of the hand. A loop extends outwardly of one end of the housing for receiving and encircling the base of the fourth finger. Switches or other control units in the housing have operating members extending upwardly of the housing for operation by third and fourth fingers. The holder is connected to the housing integrally or separably. The holder may include a wrist band and strap integrally or separably connected together. Barb and loop fastener members may adjustable connect the strap and housing. Loop members to engage the back of the hand can be integral with the strap or with the housing. The holder can have a fingerless glove-like form with integral wrist band, strap and back portion.

United States Patent Rackson [54] HAND HELD FINGER CONTROLLED SWITCHDEVICE WITH FLEXIBLE WRIST STRAP MOUNT [72] inventor: Chester B.Racltson, 22 Orchard Drive, Woodbury, NY. 11797 [22] Filed: May 10, 1971[211 App]. No.: 141,726

[ 1 Oct. 24, 1972 3,532,344 10/1970 Mas'stab ..2/160X PrimaryExaminer--J. R. Scott Attorney-Polachek & Saulsbury & Hough ABSTRACT Acontrol device for apparatus is adapted for support on the fourth fingerof an operators hand, has a housing of contoured shape to fit in thepalm of the hand. A loop extends outwardly of one end of the housing forreceiving and encircling the base of the fourth finger. Switches orother control units in the housing have operating members extendingupwardly of the housing for operation by third and fourth fingers. Theholder is connected to the housing integrally or separably. The holdermay include a wrist band and strap integrally or separably connectedtogether. Barb and loop fastener members may adjustable connect thestrap and housing. Loop members to engage the back of the hand can beintegral with the strap or with the housing. The holder can have afingerless glovelike form with integral wrist band, strap and backportion.

20 Claims, 31 Drawing Figures PATENTEDum 24 m2 SHEET 1 OF 7 FIG FIG. 2.

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sum 3 OF 7 INVENTOR.

CHESTER B. RACKSON 4 FIG. l2. 1 Wm PATENTEDHBI 24 1912 SHEET t 0F 7 I NVEN TOR. CHESTER B. RACKSON ATTURNFYE FIGJG.

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INVENTOR. R-B. RACKSON ATTURNEYS 276 CHESTE PATENTED 1972 3. 700.836

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SHEET 7 BF 7 s4 .00 i 86 'm W INVENTOR. CHESTER B. RACKSON ATTURNEYSHAND HELD FINGER CONTROLLED SWITCH DEVICE WITH FLEXIBLE WRIST STRAPMOUNT This invention concerns a finger mounting control device withholder for mounting retaining the device in nonrotatable, snugly seatedposition in the palm of an operators hand. The device is particularlyadapted for controlling dental equipment, but is generally applicable toother fields for controlling electrical, pneumatic or hydraulicapparatus, or combinations thereof, wherever an operator must retainfreedom of arm, hand and finger movement while retaining the controldevice in manual operating position at all times.

Finger and hand mounting control devices proposed heretofore have notproven practical in applications such as the dental fields because theywere mounted on or were held by fingers which must remain free forperforming other operations while the control device remains inoperating position in the hand. Typical of these prior control devicesor switch mountings are described in U.S. Pat. Nos. 879,254 and3,226,501.

The problem of providing a dentist or dental operator with apparatuscontrol means which can be instantly and continuously operated whileleaving the normally used fingers and hands free for performing complexoperations, has been a particularly difficult one in the dental field.Generally, the expedient resorted to has been provision of a footcontrol switch or assembly to activate the dental drilling handpiece.This type of switch has many objections. It requires that the dentaloperator stand or sit in an unbalanced fashion with one foot relieved ofbody weight and constantly in a ready position for quick release ofpressure on the foot control switch. This is a very tiring position andprevents continuous efficient operation by the dental operator. The footcontrol constitutes a safety hazard since it is always underfoot and isattached to electric and pneumatic lines extending outwardly from thefoot control. The foot control is an unsightly, dangerous, inefficientdevice on an otherwise clear floor area.

The objections to the foot switch control have been recognizedheretofore. One proposed remedy described in U.S. Pat. No. 3,388,472 hasbeen provision of a mouthpiece connected via a pneumatic tube to apneumatic control device. While this eliminates the objectionable footswitch, it replaces it with an objectionable mouthpiece.

The present invention takes a new approach to the problem by providing anew hand held and operated control device which performs all the controlfunctions of a foot control switch, thus eliminating the need for a footswitch. The hand held control device fits comfortably in one hand,attached to the fourth finger or palm of the hand which heretofore hashad only very limited or no function in normal dental procedures. Thethumb and other fingers of the hand are free to hold a dental mouthmirror to retract a patients cheek and to perform other necessaryfunctions. The control device always remains in operating position byapplication of andfor operation by the third and fourth fingers of thehandholding the device. Only light finger pressure is required tooperate switch buttons extending upwardly of the device which has acontoured housing to fit snugly in the palm of the hand. Levers can beprovided on the device for applying pressure to the switch buttons bythird and fourth fingers. The device enables continued use of a dentaldrill at variable or selected speeds with or without water coolant atthe will of the dental operator. Release of pressure on a switch buttonimmediately stops revolution of the dental drill upon completion of aparticular operation of in case of sudden movement of the patient, butleaves the dentistss fingers and instruments oriented with respect tothe patients mouth position to resume operations as desired.

The control device may be arranged to convey signal impulses tocontrolled apparatus via a flexible, insu lated cable. However, thedevice can be operated without external wires by enclosing a miniaturesupersonic or electromagnetic transmitter. The miniature size of thedevice enables rapid, more accurate on-off control of external circuitryand apparatus. Use of the control device results in lessened operatorfatigue, and prevents body disabilities heretofore caused by continueduse of foot control devices. General health improvement results becausebackaches, foot problems, neck strains, restricted breathing, shouldermisalignment, and other difficulties directly traceable to use of footcontrol devices are avoided.

Any desired number of independent or interconnected switches can beincorporated in the control device. Other and further features, objectsand advantages of the invention will become apparent from the followingdetailed description taken together with the accompanying drawings,wherein:

FIG. 1 is a top view of first assembly including a first control deviceand first holder embodying the invention, with a circuit plug shown inperspective.

FIG. 2 is a side elevational view of the first assembly of controldevice and holder band.

FIG. 3 is a longitudinal sectional view taken on line 3-3 of FIG. 1.

FIG. 4 is a bottom plan view of the first control device per se.

FIG. 5 is a perspective view of the first holder per se.

FIG. 6 is a cross sectional view taken on line 6-6 of FIG. 5.

FIG. 7 is a plan view of the first holder shown in place on the hand andwrist of an operator.

FIG. 8 is a perspective view showing the first assembly of controldevice and holder in hand held position.

FIG. 9 is a side view of a modified second control device according tothe invention.

FIG. 10 is an end view of the second control device I taken on line l010of FIG. 9.

FIG. 11 is a perspective view of a second holder adapted for use in asecond assembly with the second control device.

FIG. 12 is a cross sectional view taken on line 12 12 of FIG. 11.

FIG. 13 is a plan view of a third holder shown in place on the hand andwrist of an operator.

FIG. 14 is a perspective view of the third holder per se.

FIG. 15 is an end view of the third holder taken on line 15--15 of FIG14. a

FIG. 16 is a perspective view showing a third assembly including thethird holder and first control device in hand held position.

FIG. 17 is a perspective view of a fourth holder per se.

FIG. 18 is an end view of the fourth holder taken on line 18-18 of FIG.17.

FIG. 19 is a perspective view of a fifth holder.

FIG. 20 is a fragmentary longitudinal sectional view taken on line 20-20of FIG. 19.

FIG. 21 is a perspective view of part of a sixth holder.

FIG. 22 is an enlarged fragmentary cross sectional view taken on line2222 of FIG. 21.

FIG. 23 is a top plan view of a fourth assembly including a fourthcontrol device with holder comprising an integral wrist strap andseparate wrist band.

FIG. 24 is a side view of the fourth control device and holder of FIG.23.

FIG. 25 is an end view of the fourth control device taken on line 25-15of FIG. 24.

FIG. 26 is a side view of a fifth assembly including fifth controldevice with holder comprising an integral wrist strap and wrist band.

FIG. 27 is a perspective view of part of the wrist strap and wrist bandof the holder of FIG. 26.

FIG. 28 is a top plan view of a sixth control device with holdercomprising an integral hand strap.

FIG. 29 and FIG. 30 are opposite side views taken on line 29-29 and30-30 of FIG. 28.

FIG. 31 is an end view taken on line 3131 of FIG. 28.

Referring first to FIGS. 1-4 and 8, there is shown a first controldevice S1 comprising a closed housing 20, including a hollow base 21 andcover plate 22. The base has a contoured shape to fit snugly in the palmof an operators hand H. Vertical end wall 24 of the base issubstantially flat with rounded corners 25 merging smoothly into flatside wall 26 and curved angularly disposed opposite side wall 28. Theflat bottom 30 of the base has an upwardly extending angular portion 32tapering to wedge shaped end 34. The top rim 36 of the open top of thebase is flat. Cover plate 22 overlays rim 36 and is removably secured byscrews 38. The chamber 40 inside the housing is effectively closed andsealed off from the external contaminents. The cover plate can beremoved to provide access to internal parts in chamber 40.

The cover plate is provided with a lateral outer recess 42 and an innergroove 44 in both of which are slidably engaged respectively oppositesides 46, 48 of a U-shaped finger engaging loop 50. The cover plate isformed with an arcuate edge 54 facing the inner side of loop 50 todefine therewith a ring to receive the little or fourth finger F4 ofhand H. Loop 50 is a flexible or rigid member and is adjustably held byscrew 51 in the side of plate 22. Screw 51 extends through slot 53 inside 46 of the loop.

Mounted under the cover plate is a switch 56 having a sleeve 58 securedin an aperture in the cover plate.

An operating spring biased pushbutton 62 extends upwardly into slot 64formed in the underside of operating lever 66. Lever 66 is aligned withloop 50 longitudinally of the housing so the lever can be depressed byfinger F4. The lever is pivotally held by a bolt 68 engaged in a slot 70formed in the lever near one end thereof. The bolt is secured into thethreaded hole 71 in the cover plate. The pushbutton 62 holds the freeother end of the lever in an elevated position. A U-shaped leaf spring72 can be provided at bolt 68 to operate as a hinge, and to additionallyassist in holding the lever in elevated position for preventinginadvertent downward movement of the lever against the pushbutton.

Another switch 74 is disposed laterally of switch 56 and is providedwith a sleeve 75 secured in aperture 78 in the cover plate. A springbiased operating pushbutton 80 in sleeve 75 extends upwardly of thecover plate for operating switch 74 by the third finger F3 of theoperators hand.

A further switch 82 is mounted inside of end wall 24. Switch 82 has ablock 84 set in a rectangular aperture 85 in wall 24. A plurality ofoperating pushbuttons 86 are provided for operating independent sectionsof switch 82. These pushbuttons extend outwardly of end wall 24 and canbe operated by the other hand of the operator for circuitry variations.

The several switches have leads 88 in chamber 40. These leads can beinterconnected in various ways depending on the external circuitry to becontrolled by the switches. Alternatively each lead can form one wire ofa flexible cable 90 shown in FIG. 1 terminating at a plug 92 havingindividual prongs 94 for the respective wires from the switches. Thisplug can be engaged in a suitable socket or receptacle of an externalcircuit controlled by the switches.

In order to maintain the control device in a stable position on the handH of an operator, there is provided a holder including flexible wristband 151 integral with a flexible wrist strap 152 shown in FIGS. I3 and5-8. The free ends of the wrist band 151 are provided with pads 154, 156having mating barbed hooks and loops 157, 158 thereon. These constitutea Velcro" type of adjustable fastener for holding the wrist band snuglyaround the wrist W of the operator. The flexible wrist strap 152 extendslongitudinally forward and terminates in a wide portion 160 having aconvex bottom 162 to fit snugly in the palm P of the hand H. The flattop of strap portion 160 is covered with a fastener pad 164 having barbs166 thereon. These engage loops 168 on pad 170 secured to the flatbottom 30 of base 21 of the control device. By this arrangement thecontrol device and wrist strap are detachably and adjustably secured toeach other.

FIG. 8 shows the control device S1 held in the left hand H of anoperator. The wrist band 151 encircles the wrist W and is securedthereat by the hook and loop fasteners. The fourth or little finger F4extends through loop 50 while the housing 20 nestles snugly on strap 152in the palm P near the right or outer edge of the hand. This leaves thethumb T and first three fingers, F1, F2 and F3, free for manipulatingand operating other instruments. When necessary, the third finger F3 canbe depressed to contact switch button 80 for operating switch 74, shownin FIG. 1.

It will be apparent by the arrangement described, that the operator hascomplete freedom of movement of hand H. Cable 90 is flexible and can beextended up alongside the operators arm or disposed in any other way topermit freedom of hand and arm movement. Furthermore, the thumb andforefinger F1 and second finger F2 which are the most essential onesused in performing operations, are completely free. The third finger F3is also free and need only occasionally be used in operating pushbutton80. The little finger F4 normally rests on lever 66. However, it will beunderstood that it is possible to raise this finger from the lever toassist the other fingers in some operation, while the control devicewill be retained on the hand by the engagement of the loop 50 at thebase of the fourth finger, and attached to the pad 166.

The housing 20 is preferably made of plastic or light weight metal whichcan be sterilized. The tightly closed cover plate 22 will excludesterilizing fluids from chamber 40 where the electrical or controlcomponents are located.

The holder 150 is made of sterilizable plastic material which isflexible to confonn readily to the curvature of the wrist and palm ofthe hand.

FIGS. 9 and 10 show a second control device S2, which is used withholder 150A of FIGS. 11, 12. Device S2 is similar to device S1 andcorresponding parts are identically numbered. In device S2, base 21a isformed with a contoured concave recess 100 in the upwardly extendingangular portion 32a of the bottom of the base. In this recess is a pad180 having Velcro fastener loops 182 thereon. The wider end of housing21a is formedwith a convex bottom portion 103 and is contoured at edge105 to fit a correspondingly shaped end portion 184 of flexible wriststrap 152a shown in FIGS. 11 and 12. Recess100 receives the curved endportion 184 of strap 152a, which is covered with pad 186 having fastenerbarbs 186' thereon to engage loops 182 on pad 180. The underside of endportion 184 of the wrist strap is concave to receive the fleshy part ofthe palm and first joint of finger F4 (FIG. 8) so that the device isheld more comfortably in the hand. Strap 152a is integral with wristband 151. Lever 66a is formed with a concave recess 102 at its upperside in which the fourth finger F4 seats comfortably. This assembly ofcontrol device, and holder 150A enables the operator to hold the controldevice comfortably for an extended period of time without feelingfatigue and without interference with operation of instruments by thefree thumb and forefingers. Furthermore, the operator can raise hisfingers F3 and F4 from the control device which will remain in stableposition and will not turn around finger F4 nor will it become displacedfrom the palm of the hand. Thus, it is always ready for operation.

FIGS. 13-16 show a flexible holder 200 for a control device including awrist band 201 integral with a wrist strap 202 which terminates in afingerless glove-like end portion 204. Ends of the wrist band areengageable by snap fasteners 206, 207. End portion 204 has two loops208, 210 which receive fingers F3 and F4 and engage at the base or rootof the fingers. Fingers F1 and F2 extend through wide loop 211. Strap202 overlays palm P and is provided with a pad 212 having barbs 214thereon for engaging loops 168 of pad 170 on control device 81 (see FIG.4). FIG. 16 shows control device S1 engaged on holder 200 with finger F4extending through loop 50 to operate lever 66. The holder has a backportion 216 integral with the wrist band 201 and end portion 204 of thestrap 202. The control device will remain in place even though thefingers F3 and F4 release the control device, so that it is always readyfor operation.

FIGS. 17 and 18 show a flexible holder 250 including a wrist band 252integral with wrist strap 254. The strap is formed at its forward endwith an integral loop 256 which partially encircles the back of thehand. Pad 260 has barbs 262 thereon for engaging loops 168 on pad 170 ofthe control device. Pad 260 is mounted at the forward end of strap 254to overlay the palm of the operators hand. The control device will seatsecurely on the holder and will not become detached accidentally, norwill it turn around finger F4 (FIG. 8) when the fingers F3 and F4release the control device. Pads 154, 156 on the wrist band havemutually engaging barbs and loops for adjustably engaging the wrist asexplained above in connection with holder in FIGS. 1-8.

Holder 275 shown in FIGS. 19 and 20 has a separate flexible wrist band276 engaged in a turned up loop 278 formed in the rear end of plastic,flexible wrist strap 280. The strap terminates in an end portion 282having a convex bottom surface 284 to fit snugly in the palm of the handof the operator. On end portion 282 is a pad 286 provided with barbs 288to engage loops 168 of pad on control device S1 (FIG. 4).

Holder 275a shown in FIGS. 21, 22 is similar to holder 275 except thatmating snap fastener members 290, 292 are provided on the flexible wristband 276a and rear end of flexible strap 280a for detachably engagingthese parts together.

Holder 300 shown in FIGS. 23-25 includes a flexible wrist strap 302which is integral with the rear wall 24 of base 21b of control deviceS3. The strap extends rearwardly and terminates in an upwardly turnedloop 304 which engages a separate wrist band 276. Ends of the wrist bandare adjustably secured together by barbs and loops on pads 154, 156 suchas shown in'FlG. 19. The base 21b of the control device has a concavebottom recess 100 similar to that shown in device S2 of FIG. 10 to fitthe contour of the palm of the hand. The fastener pad employed in deviceS2 is here omitted.

Holder 300A shown in FIGS. 26 and 27 is similar to holder 300 with themodification that flexible wrist band 310 is integral with the flexiblewrist strap 302a. Strap 302 in turn is integral with the rear wall 24 ofcontrol device S3 in the same manner as explained in connection withFIGS. 22-25.

Holder 300B shown in FIGS. 28-31 comprises a flexible loop 320 which isintegrally formed with side wall 26 of base 21d in control device S4;other parts corresponding to those of device S2 shown in FIGS. 9, 10.

The loop 320 engages the back of the hand and cooperates with loop 50 inholding the control device in place on the operators hand. The loop isquickly disengageable when removal of the control device is desired.

The control devices and holders described above are particularly welladapted for use in dental operations. The devices will fit comfortablyin the hand engaged with the fourth finger which heretofore has hadlimited usage in dental procedures. However, this finger is stillavailable to operate when necessary simply by lifting it from theoperating lever while the device remains in place held by the holderengaged around the back of the hand and/or around the wrist.

The control devices and holders described have utility in other thandental operating fields, wherever a hand held control device is requiredwhich will not interfere 'with arm, hand or finger movements of anoperator. It is possible to install a miniature supersonic orelectromagnetic wave transmitter in the housing of the device. Thetransmitter will be operable by one or more of the outwardly extendingswitch buttons. In this arrangement the external cable 90 can beomitted.

The control devices for electrical apparatus can be converted byexchanging the disclosed electrical components to parts for controllingor actuating lines of fluid mechanisms such as pneumatic or hydraulicdevices. The control devices can be constructed to control apparatuscombining any two or more electrical, pneumatic and hydraulic equipment,units or devices.

While a limited number of embodiments of the invention have beendescribed, it will be understood that many other modifications arepossible without departing from the spirit and scope of the invention asdefined in the appended claims.

What is claimed is:

l. A control device and holder therefor, adapted for support in the palmof the hand of an operator, said control device comprising a housinghaving a contoured shape to fit snugly in the outer side of the palm ofthe hand while extending longitudinally thereof and of a size spanningbut third and fourth fingers thereof; a loop-like structure extendingoutwardly of one end of the housing for receiving and engaging at leastone of these fingers of the hand over the outer finger joints andadjacent to the knuckle joint with the hand; and at least one controlunit in the housing having an operating member extending upwardly fromthe housing and in longitudinal axial alignment with the loop-likestructure and at a location for engagement of and for operation by atleast one of these fingers, whereby the thumb and the other fingers ofthe hand are left completely free for operating other operations; saidholder comprising means independent of said loop-like structure andconnected to said housing to hold the control device in non-rotatablesnugly seated position in the palm of the hand.

2. A control device and holder, as defined in claim 1, wherein saidholder comprises a wrist band; and a strap connected at one end thereofto the wrist band, and connected at its other end to the housing.

3. A control device and holder as defined in claim 2, wherein the holderfurther comprises quickly detachable mutually engageable fastening meanson the other end of the strap and on the underside of the housingdisengageably connecting the housing and strap.

4. A control device and holder as defined in claim 3, wherein thefastening means, comprises pads having mutually engageable barbs andloops.

5. A control device and holder as defined in claim 2, wherein said wristband and strap are integrally joined together.

6. A control device and holder as defined in claim 3, wherein said wristband has free ends; and further quickly detachable mutually engageablefastening means on said free ends of the wrist band for adjustablyholding the wrist band around the operators wrist.

7. A control device and holder as defined in claim 3, wherein saidhousing has a flat bottom portion, and wherein said strap has a flatportion arranged to abut said bottom portion of the housing with saidfastening means disposed therebetween for connecting the housing andstrap.

8. A control device and holder as defined in claim 3, wherein saidhousing has a recessed bottom portion contoured to fit the palm of theoperators hand, and wherein said strap has a curved end portion arrangedto engage in said recess with said fastening means disposed therebetweenfor connecting the housing and EPA control device and holder as definedin claim 3, wherein said holder further comprises a back portionintegral with said wrist band and strap and connected to the strap byopen loops receiving fingers of the hand.

10. A control device and holder as defined in claim 9, wherein saidwrist band has free ends; and further quickly detachable mutuallyengageable fastening means on said free ends of the wrist band foradjustably holding the wrist band around the operators wrist.

11. A control device and holder as defined in claim 3, wherein saidholder further comprises a loop integral with said one end of the strapand extending laterally to engage the back of the hand.

12. A control device and holder as defined in claim 2, wherein saidwrist band and strap are separate members, and means for detachablyconnecting the wrist band and strap.

13. A control device and holder as defined in claim 2, wherein saidstrap is integral with housing and extends rearwardly from the other endof the housing.

14. A control device and holder as defined in claim 13, wherein saidwrist band and strap are separate members; and means for detachablyconnecting the wrist band and strap.

15. A control device and holder as defined in claim 14, wherein saidwrist band has free ends; and further quickly detachable mutuallyengageable fastening means on said free ends of the wrist band foradjustably holding the wrist band around the operators wrist.

16. A control device and holder as defined in claim 13, wherein saidwrist band and strap are integrally joined together at the other end ofthe strap.

17. A control device and holder as defined in claim 2, wherein saidholder is a flexible loop integral with a side of the housing andextending laterally thereof to engage the back of the operators hand.

18. A control device and holder as defined in claim 6, wherein saidfurther fastening means comprises pads having mutually engageable barbsand loops.

19. A control device and holder as defined in claim 12, wherein the lastnamed means comprises a turned back loop formed at the other end of saidstrap.

20. A control device and holder as defined in claim 14, wherein the lastnamed means comprises snap fastener members.

1. A control device and holder therefor, adapted for support in the palmof the hand of an operator, said control device comprising a housinghaving a contoured shape to fit snugly in the outer side of the palm ofthe hand while extending longitudinally thereof and of a size spanningbut third and fourth fingers thereof; a loop-like structure extendingoutwardly of one end of the housing for receiving and engaging at leastone of these fingers of the hand over the outer finger joints andadjacent to the knuckle joint with the hand; and at least one controlunit in the housing having an operating member extending upwardly fromthe housing and in longitudinal axial alignment with the loop-likestructure and at a location for engagement of and for operation by atleast one of these fingers, whereby the thumb and the other fingers ofthe hand are left completely free for operating other operations; saidholder comprising means independent of said loop-like structure andconnected to said housing to hold the control device in non-rotatablesnugly seated position in the palm of the hand.
 2. A control device andholder, as defined in claim 1, wherein said holder comprises a wristband; and a strap connected at one end thereof to the wrist band, andconnected at its other end to the housing.
 3. A control device andholder as defined in claim 2, wherein the holder further comprisesquickly detachable mutually engageable fastening means on the other endof the strap and on the underside of the housing disengageablyconnecting the housing and strap.
 4. A control device and holder asdefined in claim 3, wherein the fastening means, comprises Pads havingmutually engageable barbs and loops.
 5. A control device and holder asdefined in claim 2, wherein said wrist band and strap are integrallyjoined together.
 6. A control device and holder as defined in claim 3,wherein said wrist band has free ends; and further quickly detachablemutually engageable fastening means on said free ends of the wrist bandfor adjustably holding the wrist band around the operator''s wrist.
 7. Acontrol device and holder as defined in claim 3, wherein said housinghas a flat bottom portion, and wherein said strap has a flat portionarranged to abut said bottom portion of the housing with said fasteningmeans disposed therebetween for connecting the housing and strap.
 8. Acontrol device and holder as defined in claim 3, wherein said housinghas a recessed bottom portion contoured to fit the palm of theoperator''s hand, and wherein said strap has a curved end portionarranged to engage in said recess with said fastening means disposedtherebetween for connecting the housing and strap.
 9. A control deviceand holder as defined in claim 3, wherein said holder further comprisesa back portion integral with said wrist band and strap and connected tothe strap by open loops receiving fingers of the hand.
 10. A controldevice and holder as defined in claim 9, wherein said wrist band hasfree ends; and further quickly detachable mutually engageable fasteningmeans on said free ends of the wrist band for adjustably holding thewrist band around the operator''s wrist.
 11. A control device and holderas defined in claim 3, wherein said holder further comprises a loopintegral with said one end of the strap and extending laterally toengage the back of the hand.
 12. A control device and holder as definedin claim 2, wherein said wrist band and strap are separate members, andmeans for detachably connecting the wrist band and strap.
 13. A controldevice and holder as defined in claim 2, wherein said strap is integralwith housing and extends rearwardly from the other end of the housing.14. A control device and holder as defined in claim 13, wherein saidwrist band and strap are separate members; and means for detachablyconnecting the wrist band and strap.
 15. A control device and holder asdefined in claim 14, wherein said wrist band has free ends; and furtherquickly detachable mutually engageable fastening means on said free endsof the wrist band for adjustably holding the wrist band around theoperator''s wrist.
 16. A control device and holder as defined in claim13, wherein said wrist band and strap are integrally joined together atthe other end of the strap.
 17. A control device and holder as definedin claim 2, wherein said holder is a flexible loop integral with a sideof the housing and extending laterally thereof to engage the back of theoperator''s hand.
 18. A control device and holder as defined in claim 6,wherein said further fastening means comprises pads having mutuallyengageable barbs and loops.
 19. A control device and holder as definedin claim 12, wherein the last named means comprises a turned back loopformed at the other end of said strap.
 20. A control device and holderas defined in claim 14, wherein the last named means comprises snapfastener members.